Well, in gambling and sports betting, first you need to make sure that the site is 100% legit and also the site is fair and trusted. Since you checked Roobet, it is a well-reputed site so you do not have any issues with that site.
For bookies sites, you also have to see how fast they process each of our bets because I have experienced where when winning a bet, the bookies took quite a long time to credit the amount of the winning to my balance because the betting provider hasn't processed it yet, which is quite strange in my opinion. At Roobet several times I've made bets they process my bets very quickly, even when your bet wins but the match is still running sometimes it's credited immediately without waiting for the match to end, so Roobet is indeed one that can be trusted.
However, winning in bets is something else and you need to be lucky in order to win the bets. There will be times when you will mostly lose most of the bets and during this period it is better to take a break from gambling. However at other times you may be having good luck and winning most of the bets.
Maybe if we often experience defeat, we can start to only bet when there are big matches because usually all the information needed to analyze matches will be available on the internet so that we have enough references to all the possibilities that can happen so that betting does not only depend on luck because in sports betting is the ability to analyze even though defeat is still possible.